Research Article

Effectiveness of Variable-Gain Kalman Filter Based on Angle Error Calculated from Acceleration Signals in Lower Limb Angle Measurement with Inertial Sensors

Figure 4

Evaluation results of correlation coefficient (ρ) of measured inclination angles during treadmill walking. Average values obtained from the results of 5 trials of all subjects are shown for each walking speed.
398042.fig.004a
(a) Foot inclination angle  
398042.fig.004b
(b) Shank inclination angle
398042.fig.004c
(c) Thigh inclination angle